This isn't role-playing as you generally associate it. There are no levels or perks here. Instead, this is role-playing in the strictest sense of the word, as a bunch of gamers act out the roles they've assumed in-game.

This is footage from a British ArmA II group, who not only went to the trouble of mocking up a fake TV news story, but even added fake news broadscast tickers and logos to go with it.

The opening is pretty hammy, but once the inevitable ambush kicks in, it all gets surprisingly entertaining/realistic and really sells just how serious a game ArmA II can be.

ArmA II is a military shooter from the developers behind the original Operation Flashpoint game. There's a third game in the series currently in development.

This is Some Serious Role-Playing

Arma 2: The Player News Report [Rock, Paper, Shotgun]